from rest_framework.views import exception_handler
from rest_framework.response import Response
from rest_framework import status
from django.db import DatabaseError
from redis import RedisError
import logging
logger = logging.getLogger('django')


def custom_exception_handler(exc, context):
    """
        自定义异常处理
        :param exc: 异常类
        :param context: 抛出异常的上下文
        :return: Response响应对象
    """
    # 调用drf框架原生的异常处理方法
    response = exception_handler(exc, context)
    if response is None:
        view = context['view']
        if isinstance(exc, DatabaseError) or isinstance(exc, RedisError):
            """数据库异常"""
            logger.error('[%s] %s' % (view, exc))
            response = Response("服务器内部错误！", status=status.HTTP_507_INSUFFICIENT_STORAGE)
    return response
